RDWC Plans? Anyone built one yet...

I am looking for some rdwc plans to build a system. Any of you guys used that type to grow as of yet? The only one I have seen for sale is current culture h20 and is a totall rip-off. It is a great design and pretty straight foward but for some reason they want a boat load of cash for them. I am familiar with soil,aero,dwc and ebb and flow but never really built a system. I just want the benefits of both worlds with a recirculating dwc. Thanks for any tips on pointing me in the right direction.